Best available copy



BEST AVAILABLE COPY T W DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in llCCfiiddiKP with the Notice of Apr. 11. 1068. S49 0.6. 1221. trip tlficntlon is by serial number of the npplitntior nntl the hoztdin: indictttvs the number or pans of specification. inrlndii claims, and of sheets of drawing rontalnml in th:- ili l i fliil il :ts originally iilml. The file of this application is nvnllniile the public for lnspectlon; roproductlon nuty bi lIiII'Cil-ISEI for :10 C(III.S per sheet.

Applications published under the [)Ofvnsire lublimttion l'rnrrntn have not been examined as to the merits of allegt invention. The Patent Office makes no ;l-lat'l[l ll its in the novelty of the disclosed subject matter.

Pl 'l5Ll jllliI) APRIL :2, 100:)

so] ().(i. 1020 700.485 PROCESS FOR MAKING LIQUID FUELS FROM COAL Charles E. Hemminger. 31 Fair Hill Road, Westfield, NJ. 07090. and Seymour Stahl, 135 Windsor Way, Berkeley Heights. NJ. 07922 Filed Jan. 25. 1968. Published Apr. 22, 1969 Class 208-10 2 Sheets Drawing. 11 Pages Specification l La 7 This disclosure relates to a process for making liquid fuels from coal comprising liquefaction of ground coal in a slurry, solvent treatment of the liquefaction etfluent at supercritical conditions and subsaquent refining of the liquid. Optimum t'ondttions for the unique supercritical separation step will depend upon the critical temperature of the solvent and :he molecular type distribution of the feed. TCmpCl'1llttl'c\ mitrange from 210-500 F. and pressures mu rtmgu imm 750-5000 psia. Suitable soltents include ethane. propane. butane, pcntane, hexane, ethylene, proptlcnc. hut lene, halogenated light hydrocarbons. CO ammonia, 50;. ctc. An essentially solid raffinate phase and an essentially liquid extract phase suitable for hydrocraciting are rccotered from the supcrcritical separation step.

SEARCH l 6 On T c. E. HEMMINGER DEF. PUB. g PROCESS FOR MAKING LIQUID FUELS FROM COAL Filed Jan. 25, 1968 BEST AVAILABLE COPY April 22, 1969 Sheet 1 of 2 A 2 s on om m m $5509.91 mm 5339mm Toz 0: 3,3 $13529: N? 55:55 2* l .m i A h 0% 2 2 mohmm I 2 S 022055: 3 95.5% 2

:2: SW Q S w20- ZOCuxlwDOI Patent Attorney 95s? AVAILABLE crew April 22, 1969 c. E. HEMMINGER ETAL DEF. PUB. y:

PROCESS FOR MAKING LIQUID FUELS mom COAL 3N 700L485 Filed Jan. 25. 1968 Sheet & of 2 o: o 5 n 5 o I m E: I

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